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7 Cards in this Set
- Front
- Back
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Section views are used for three main purposes:
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• To document the design and manufacture of single parts that are manufactured as one piece.
• To document how multiple parts are to be assembled or built. • To aid in visualizing the internal workings of a design. |
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The Cutting Plane
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The cutting plane appears edgewise as a thick dashed line called the cutting-plane line. The arrows at the ends of the cutting-plane line indicate the direction of sight for the sectional view.
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Visible Edges on Cutting Planes
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Newly visible edges cut by cutting plane are crosshatched with section lining.
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RULES FOR LINES IN SECTIONVIEWS |
-Show edges and contours that are now visible behind the cutting plane. -Omit hidden lines in section views. |
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RULES FOR LINES IN SECTION VIEWS CONT |
-A sectioned area is always completely bounded by a visible outline—never by a hidden line. -A visible line can never cross a sectioned area in a view of a single part. |
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CUTTING-PLANE LINE STYLE |
It is made up of equal dashes, each about 6 mm (1/4“) long ending in arrowheads. This form works especially well for drawings. |
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SECTION-LINING TECHNIQUE |
• Uniformly spaced by an interval of about 2.5 mm• Not too close together• Uniformly thin, not varying in thickness• Distinctly thinner than visible lines• Neither running beyond nor stopping short of visible outlines
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